Fuel-mixing device for internal-combustion engines



1927. o. SELG FUEL MIXING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed April 6. 1926 2 Sheets-Sheet l I/VVE/l/TOR 07m .95; 6

' A TTORNEVS MIN W/TNESS FUEL MIXING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed April 6. 1926 2 Sheets-Sheet 2 l/VVE/VTOH 0270 551.6

Patented (lot. 25, I927.

OTTO SELG, OF NEW YORK, N. Y.

FUEL-MIXING DEVICE FOR INTERNAL-COMBUSTION ENGINES.

Application filed April 6, 1926. Serial No. 100,045.

My invention relates to fuel mixing and atomizing devices for internal combustion engines and has for its object to provide a device of novel and simple construction whereby a most intimate mixture of fuel and air or a most efficient atomization of the fuel is provided for introduction into the com bustion chambers of an internal combustion engine. Other more specific objects will appear from the description hereinafter and the features of novelty will be pointed out in the claims.

In the accompanying drawings which show examples of the invention without defining its limits, Fig. 1 is a diagrammatic view illustrating an application of the invention to an internal combustion engine; Fig. 2 is an end view of one form of the mixing device; Fig. 3 is a sectional view on the line 33 of Fig. 2; Fig; 4 is an end view of another form of the device; Fig. 5 is a sectional view on the line 5-5 of Fig. 4:; and Fig. 6 is a sectional view on the line 66 of Fig. 5.

The invention comprises essentially a roughened section located upon a predetermined portion of the interior surface of the connection between the carburetor and the intake manifold of an internal combustion engine or between a source of fuel supply and the combustion chamber of the engine, in combination with deflecting means located in said connection in the path of the fuel mixture for diverting the latter into impacting engagement with said roughened section. The device may be incorporated as a part of the aforesaid connection; in its preferred form, the device, however, comprises a unit capable of being indc1')endentlyintroduced into the connection which customarily extends between the carburetor and the intake manifold or between a source of fuel supply and the combustion chamber, which unit includes not only the aforesaid roughened section but also the deflecting means referred to. It will be understood, as previously suggested, that in some cases the roughened section may be produced upon a predetermined portion of the usual connection in which case the deflecting means is inserted into place directly in this connection.

As shown in Figs. 2 and 3, the device comprises a tubular section or shell 10 provided at its opposite ends with flanges 11 for fixing said shell inplace in the connection (1 whereby the carburetor b is connected in the customary manner with the intake manifold c of an internal combustion engine (Z. The interior surface of the shell 10 is roughened as indicated at 12 in any suitable manner to provide the desired results, the illustrated example showing the interior surface of said shell fluted in a lengthwise direction as indicated in Fig. 3. The defleeting means comprises a helical member 13 the peripheral edge of which is serrated as indicated at 1 1 to fit the fiutings 12 of the shell 10, and the surfaces of which are preferably also roughened for instance as indicated at 15 in Fig. 3. As shown in said figure, the form of the member 13 is that of an unequal helix, the spiral convolutions near the upper end of the shell in Fig. 3 being somewhat shallower than the convolutions thereof at the lower end of said shell. In practice, the helical member 13 is fitted into the shell 10 with its serrated edge 14: in interlocking mesh with the flutings 12 so as to be held in place by frictional engagement of the parts; to properly position the helical member 13 in said shell 10 and to prevent it from being forced lengthwise thereof in a downward direction in Fig. 3, the flutings 12 are terminated at a slight distance from the one end of the shell 10 so as to form abutments for the overhanging projections 16 constituting integral parts of the deflecting member 13 as shown in Fig. 2.

In practice, assuming the device to be in position as indicated in Fig. 1, the fuel mixture passes from the carburetor into the connection a and impacts against the roughened surfaces 15 of the helical member 13. This impact with these roughened surfaces causes the fuel mixture and particuarly the fuel particles thereof to be very finely broken up and at the same time because of the helical form of the surfaces 15 deflects the mixture thus treated into impacting engagement with the fluted or otherwise roughened surfaces 12. In other words the normal flow of the fuel mixture is disturbed and is converted into a' whirling flow in which the mixture is churned, as it wer'e,'in engagement with roughened surfaces during such time as it remains within the shell 10. In this way a. most intimate mixture of fuel and air is produced in which the fuel particles are comminuted to the highest degree. After having been thus treated, the fuel mixture is introduced into the intake manifold 0 and passes nection a in the same way as the form of invention just described. The interior surface of the shell 10 is roughened as indicated at 12* for instance by being screwthreaded, the roughened section 12 at its opposite ends leading to openings 11 and 11 converging outwardly in opposite directions and formed respectively in the lids 11 and 11". In the preferred arrangement the opening 11 has its surface roughened as indicated at 11 The deflecting device in the form being described, comprises a plurality of individual Vance 13 arranged in groups which are mounted in axially spaced relation upon a spider 17 forming part of the lid 11 for instance by means of a bolt and nut 18.

The vanes 13 of each group are inclined across the axis of the deflecting means and preferably are arranged so asto slightly overlap each other as indicated in Fig. 5; in the preferred arrangement the vanes 13 of one group are in staggered relation with respect to the vanes 13 of an adjacent group.

With the form of device shown in Figs. 4, 5 and 6, the mixture of fuel and air from the carburetor passes into contact with the -vanes 13 of the first group and is deflected thereby into engagement with the roughened surface 12; those portions of the fuel and air mixture which pass the first group of vanes 13 are thrown into impacting engagement with the second group of vanes and are deflected thereby into engagement with the roughened surfaces 12 In this form also the normal flow of the fuel and air mixture is thus converted into a whirling flow so that said fuel and air mixture in this form also is churned up, as it were, in engagement with the roughened surfaces 12 and passes out through the opening 11 to the intake manifold 0. In its passage through the opening 11 the fuel and air mixture is still further acted upon b the roughened surface 11. In this way as in the memes first form, the particles of fuel are broken up to a very high degree and a. most intimate mixture of the air and fuel is also produced.

The device in all of its forms is extremely simple in construction and is easy to install either as a complete independent unit or as a part of an existing connection between a carburetor and an internal combustion engine.

While the invention has been illustrated and described in connection with an internal combustion engine of the gasoline engine type and including a carburetor, it will be obvious that the improved mixing device is equally Well'ada-pted for use in. combination with other types of internal combustion engines either with or without carburetors.

Various changes in the specific forms shown and described may be made within the jscope of the claims without departing from the spirit of my invention.

I claim:

1. A fuel mixing device for internal com bustion engines comprising a tubular section arranged'to be fitted in the connection between a carburetor and an intake manifold and having its interior surface fluted in a lengthwise direction and a helical device having a serrated peripheral edge fitted into said fluted surface and being provided with roughened surfaces against which the fuel mixture impacts and whereby it is spirally diverted into impacting engagement with said fluted surface.

2. A fuel mixing device for internal oombustion engines comprising a tubular connection between a carburetor and an intake manifold, said connection having its interior surface provided with grooves, and a detachable helical mixing device having a serrated peripheral edge fitted into said grooves, and being provided with a surface against which the fuel mixture impacts, and whereby it is spirally diverted into impacting engagement with-said grooves.

In testimony whereof I have hereunto set my hand.

' OTTO SELG. 

